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Finding the Fourth Proportional to 610,717.40, 915,638.70 and 255,548.60

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Solution

The fourth proportional to 610,717.40, 915,638.70 and 255,548.60 is: 383,139.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,717.40 : 915,638.70 = 255,548.60 : x
  2. Step 2: Convert to fraction form
    610,717.40/915,638.70 = 255,548.60/x
  3. Step 3: Cross multiply
    610,717.40x = 915,638.70 × 255,548.60
  4. Step 4: Simplify right side
    610,717.40x = 233,990,187,890.82
  5. Step 5: Solve for x
    x = 233,990,187,890.82/610,717.40
  6. Step 6: Final answer
    x = 383,139.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.